Laboratory blank results, sample AD28172, Jan 2002

NYC 9/11 Public Portal Document Quantitation Report (QT Reviewed)

Data File : C:\MSDCHEM\1\DATA\121701\CCV1.D Vial: 3 Acq On : 18 Dec 2001 3:32 am Operator: McLean Sample : 1.0 cc Inst : Instrumen Mise : Multiplr: 1.00 MS Integration Params: BENZO.P Quant Time: Dec 18 04:09:17 2001 iQuant Results File: 121401.RES

Quant Method : C:\MSDCHEM\l\5973N\121401.M (RTE Integrator) Title : Quantitation For Method 525.2 Last Update : Mon Dec 17 15:06:05 2001 Response via : Initial Calibration DataAcq Meth : 121401

Internal Standards R.T. Qlon Response Cone Units Dev(Min)

1) Acenaphthene-diO 18.21 164 9897598 5.00 ug/L 0.00 9) Phenanthrene D-10 22.53 188 14044050 5.00 ug/L 0.00 20) Chrysene D-12 30.30 240 8775292 5.00 ug/L 0.00

System Monitoring Compounds 2) 1,3-Dimethyl-2-nitrobenzen 13.13 134 2545317 5.03 ug/L 0.00 Spiked Amount 5.000 Recovery = 100.60% 19) Triphenyl Phosphate surr 29.59 326 2085589 4.88 ug/L 0.00 Spiked Amount 5.000 Recovery = 97.60% 21) Perylene D-12 surr 34.32 264 5815779 5.01 ug/L 0.00 Spiked Amount 5.000 Recovery = 100.20%

Target Compounds Qvalue 3) Hexachlorocyclopentadiene 15.70 237 191380 <0.68 ug/L 93 4) Hexachlorobenzene 21.39 284 625276 0.95 ug/L 96 5) EPTC 16.18 128 968467 1.03 ug/L 96 6) 2,6-Dinitrotoluene 17.77 165 318398 0.94 ug/L 99 7) 2,4-Dinitotoluene 18.91 165 365567 0.90 ug/L 86 8) Molinate 19.09 126 1381944 1.04 ug/L 92 10) Simazine 21.91 201 353828 0.93 ug/L 100 11) Atrazine 22.04 200 536917 1.08 ug/L 97 12) Alachlor 23.91 160 461493 0.95 ug/L 92 13) Terbacil 22.84 161 379223m 0.86 ug/L 14) Acetochlor 23.69 146 306139 0.87 ug/L 99 15) Metribuzin 23.73 198 522762 0.93 ug/L 95 16) Metolachlor 24.84 162 1361574 0.87 ug/L 98 17) Butachlor 26.66 160 409190 0.91 ug/L 85 18) 4,4'-DDE 27.29 246 515254 0.94 ug/L 93 22) Bis (2-Ethylhexyl) adipate 29.52 129 1083394 1.05 ug/L 98 23) Bis (2-Ethylhexyl) phthala 30.96 149 1632065 0.94 ug/L 98 24) Benzo (a) pyrene 34.17 252 1612276 0.93 ug/L 99

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(#) = qualifier out of range (m) = manual integration CCV1.D 011402.M Tue Jan 15 12:33:49 2002 Page 1

NYC-WTC_000058029